Fresh-air inlet for sanitary ventilation of the drainage systems of houses, buildings, or the like.



No. 736,220. PATENTED AUG. 11, 1903. G. CODY.

FRESH AIR INLET FOR SANITARY VENTILATION OF THE DRAINAGE SYSTEMS OF HOUSES, BUILDINGS, OR THE LIKE. no MODEL .APPLIGATION FILED JULY 17, 1902.

i I INVENTOH? 56019:,

ATTORNEY No. new.

i atented August II, 196%.

PATENT OFFICE.

GEORGE ooD'Y, on NEW YORK, N.-Y., ASSIGNOR or oNE-nAfE "to" LOUIS MUNZINGER, on NEW YORK, N. Y.

FRESH-AIR INLET FOR SANITARY VENTILATION OF THE DRAINAGE SYSTEMS F HOUSES, BUILDINGS, OR THE LIKE.

SPECIFICATION forming part of Letters Patent No. 736,220, dated August 11, 1903.

Application filed July 17,1902. Serial No. 116,005. (No model.)

To ctZZ whom, it may concern.-

Be it known that I, GEORGE GoDY, a citizen of the United States, residing at Manhattan borough, New York city, in the county of New York and State of New York, have invented new and-useful Improvements in Fresh-Air Inlets for Sanitary Ventilation of the Drainage System of Houses, Buildings, or the Like, of which the following is a specification.

By means of this invention a valve or seal is provided which will insure satisfactory closure and operation and which is not liable to stick or become deranged, so as to interfere with the desired ventilation.

The invention is set forth in the following specification and claims and illustrated in the annexed drawings, in which Figure 1 'isa sectional side elevation of an inlet embodying this invention. Fig. '2 is a section along y y, Figfl. i

In the drawings is] shown an inlet-pipe a and -what may be called a spigot end b, which leads to the house-drain. The device serves to admit fresh air into the drainage to I liquid. Mercury or glycerin has been found I opened.

to answer as sealing medium, as they are practically, if not entirely, nonevaporating and not liable to change, decomposition, or the like. The sealing medium is shown at cl and can be'contained in a trough or annular receptacle efor the reception of the edge or cup-shaped disk ff. TVhen the liquid 01 surrounds the edge or disk f, the seal ismade.

Separating the disk and liquid will break the seal. The movable cup-shaped disk f acts as a valve, since when this disk is moved to seat e the passage is sealed or closed. On the disk moving clear of the seat the valve is A- hood g is adapted to be actuated by back pressure in the spigot-pipe b to close the seal. In order to effectively direct back pressure or cause the same to satisfactorily actuate the hood, the pipe I) is shown tapered or arranged to cause the back pressure therefrom to impinge or strike on the hood. The hood is shown balanced or suspended from a scale-beam or knife-edge supported lever h. The seal portion or disk f is also suspended from this lever, so as to balance or nearly balance the hood. The hood, in addition tobeing suitably balanced, is also shown guided so that its movements are accurate or properlyalined. A stem 1., sliding or guided in .a spider at pipe I), will act as a guide. The parts are normally in position or the seal open to allow fresh air to enter and pass up or out through pipe 12, leading into the house drainage-pipes. In case of back pressure or air from pipe 1) wanting to escape through inlet a such back pressure will actuate the hood to close the seal. As the liquid seal does not cause any adherence or sticking of parts 6 f the seal will readily open and allow ventilation whenever relieved from back pressure.

The apparatus is set into the interior of the building or cellar with the inlet-pipe a extend= ing through the wall 70 to the exterior air. By having the apparatus set into the interior or cellar of a building it is secure against being tampered with from the outside.

What I claim as new, and desire to secure by Letters Patent, is-

1. An air-inlet pipe and a spigot-pipe combined with a chamber provided with a nonevaporating sealing medium or liquid, a sealing-disk made to coact with the liquid to form a valve, and a hood made to counterbalance the disk and placed at the spigotpipe to receive back pressure so" as to be actuated for closing the valve.

2. An air-inlet pipe and a spigot-pipe combined with a non-evaporating sealing'medium or liquid, a lever fulcrumed between the inlet-pipe and the spigot, a sealing-disk and a hood suspended from opposite ends of the lever so as to come respectively over the inlet and spigot.

3. A chamber, an inlet-pipe and a spigotpipe both made to open upwardly into the chamber, a sealing-disk and a hood made to balance one another and located respectively over the inlet and spigot so that on back pressure from the. spigot the hood is actuated to close the disk.

4:. An air-inlet pipe, a spigot-pipe, ahood and a sealing-disk, said hood and disk being made to balance one another so as to hold the parts normally in open or unsealing position, and said hood being made to receive back pressure from the spigot so as to bring the disk to sealing or closing position.

5. An air-inlet pipe extended through a house-Wall to the outer air, a chamber made to communicate with the inlet and placed in the cellar of the house so as to be accessible from the interior and to be protected against interference from the exterior, a spigot-pipe made to communicate with the chamber, and

a normally open sealing disk or valvev and witnesses.

GEORGE CODY. WVitnesses:

CHAS. E. POENSGEN, E. F. KASTENHUBER. 

